I was pulling a pizza out of the oven when I nicked the heating element with my left ring finger. Now where a ring might be, I have a half-centimeter stripe, symmetrical enough to suggest a wedding band, a reminder of those I've worn before. It's red—the color of stop, of angry, of hurt—evoking both my marriages: the good one that reached "until death do us part," far too soon, and the bad one that made me feel diminished.